Density, Viscosity, Surface Tension of 1,3-Propanediol + Dimethyl Sulfoxide Mixed Solutions and Their Intermolecular Forces from Spectra and Computational Chemistry

ABSTRACT In this position, the density, viscosity, and surface tension of 21 diverse mass proportion of 1,3-propanediol (PDO) and dimethyl sulfoxide (DMSO) mixed solution were determined in the temperature range of 293.15-318.15 K under atmospheric pressure. Otherwise, some thermodynamic quantities were computed on the basis of the measured values of the experiment, and the intermolecular forces of mixed solutions were investigated by means of spectroscopic and computational chemistry. Which testified that the O atom in the S=O bond has hydrogen bond force with the H atom on the hydroxyl group in the alcohol molecule, and its structure is (CH3)2S=O···HO(CH2)3OH···S=O(CH3)2; meanwhile, the bond length of the O-H bonds of PDO increases and its strength decreases.